Texas Instruments
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SN74LS399D
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SN74LS399D

Product Overview

Category

SN74LS399D belongs to the category of integrated circuits (ICs).

Use

This IC is commonly used for data storage and manipulation in digital systems.

Characteristics

  • Low-power Schottky technology
  • 8-bit parallel-in/parallel-out shift register with three-state outputs
  • Wide operating voltage range: 4.75V to 5.25V
  • High-speed operation: 33 MHz typical clock frequency
  • Compatible with TTL logic levels

Package

SN74LS399D is available in a 16-pin dual in-line package (DIP).

Essence

The essence of SN74LS399D lies in its ability to store and transfer data efficiently within digital systems.

Packaging/Quantity

SN74LS399D is typically packaged in tubes or reels, with quantities varying based on customer requirements.

Specifications

  • Supply Voltage: 4.75V to 5.25V
  • Input Voltage: 0V to VCC
  • Operating Temperature Range: -40°C to +85°C
  • Output Current: ±8mA
  • Propagation Delay Time: 15ns (max)
  • Power Dissipation: 500mW (max)

Detailed Pin Configuration

  1. D0: Data input 0
  2. D1: Data input 1
  3. D2: Data input 2
  4. D3: Data input 3
  5. D4: Data input 4
  6. D5: Data input 5
  7. D6: Data input 6
  8. D7: Data input 7
  9. GND: Ground
  10. Q0: Output 0
  11. Q1: Output 1
  12. Q2: Output 2
  13. Q3: Output 3
  14. Q4: Output 4
  15. Q5: Output 5
  16. VCC: Supply voltage

Functional Features

  • Parallel-in/parallel-out shift register operation
  • Three-state outputs for bus-oriented applications
  • Direct interface with TTL levels
  • High-speed data transfer capability
  • Low power consumption

Advantages and Disadvantages

Advantages

  • Wide operating voltage range allows compatibility with various systems
  • High-speed operation enables efficient data transfer
  • Low power consumption reduces energy requirements
  • Three-state outputs facilitate bus-oriented applications

Disadvantages

  • Limited to 8-bit parallel data storage and manipulation
  • Not suitable for applications requiring larger data capacity

Working Principles

SN74LS399D operates as an 8-bit parallel-in/parallel-out shift register. It stores data in its internal memory and transfers it in parallel form based on the clock signal. The three-state outputs allow multiple devices to share a common bus, enabling efficient data exchange.

Detailed Application Field Plans

SN74LS399D finds applications in various digital systems, including but not limited to: - Microcontrollers - Data communication systems - Industrial automation - Automotive electronics - Consumer electronics

Detailed and Complete Alternative Models

  1. SN74HC399: High-speed CMOS logic compatible alternative
  2. CD74HCT399E: High-speed CMOS/TTL-compatible alternative
  3. MC74HC399: High-performance silicon-gate CMOS alternative

These alternatives offer similar functionality and can be used as replacements for SN74LS399D in different applications.

In conclusion, SN74LS399D is a versatile integrated circuit that provides efficient data storage and manipulation capabilities in digital systems. Its low-power Schottky technology, wide operating voltage range, and high-speed operation make it suitable for various applications. However, its limited data capacity may restrict its use in certain scenarios.

Liste 10 almindelige spørgsmål og svar relateret til anvendelsen af SN74LS399D i tekniske løsninger

Sure! Here are 10 common questions and answers related to the application of SN74LS399D:

  1. Q: What is SN74LS399D? A: SN74LS399D is a 4-bit universal shift register with parallel outputs, commonly used in digital circuits.

  2. Q: What is the operating voltage range for SN74LS399D? A: The operating voltage range for SN74LS399D is typically between 4.75V and 5.25V.

  3. Q: How many data inputs does SN74LS399D have? A: SN74LS399D has four data inputs (D0, D1, D2, and D3) which can be used to load data into the shift register.

  4. Q: Can SN74LS399D be used as a bidirectional shift register? A: No, SN74LS399D is a unidirectional shift register and can only shift data in one direction.

  5. Q: What is the maximum clock frequency for SN74LS399D? A: The maximum clock frequency for SN74LS399D is typically around 25 MHz.

  6. Q: How many parallel outputs does SN74LS399D have? A: SN74LS399D has four parallel outputs (Q0, Q1, Q2, and Q3) which provide the shifted data at each stage.

  7. Q: Can SN74LS399D be cascaded to increase the number of stages? A: Yes, multiple SN74LS399D chips can be cascaded together to create a larger shift register with more stages.

  8. Q: What is the purpose of the clear input (CLR) in SN74LS399D? A: The clear input (CLR) is used to reset the shift register and clear all the stored data.

  9. Q: Can SN74LS399D be used in both synchronous and asynchronous modes? A: Yes, SN74LS399D can operate in both synchronous and asynchronous modes, depending on the clock input.

  10. Q: What are some common applications of SN74LS399D? A: SN74LS399D is commonly used in applications such as data storage, serial-to-parallel conversion, parallel-to-serial conversion, and digital signal processing.

Please note that these answers are general and may vary based on specific datasheet specifications and application requirements.